Your bass makes fundamentals from 31 to 200 Hz approximately. The natural harmonics have been scoped to an upper limit around 7,000 Hz. If you are a slapper or fuzz user, these artificial harmonics can go as high as 20,000 Hz.

Most of the general public perceives a boom in the mid-bass range around 80 to 100 Hz as "bitchin' bass" response because that is what they are familiar with. Kinda like a guy who thinks AM radio is the best cuz he's never heard FM...

Rigs with large drivers that produce solid results in the low-bass region below 50 Hz are often blamed for being "slow" or "muddy". IMO this is a result of not being able to reproduce the upper-bass fundamentals and the harmonics. My bi-amp rig sounds like a muddy hawg wallow when I turn the 100 Hz-and-higher volume all the way off. The bass horsepower is still there, but the sound is heard as pure mud. Turn the highs back on, and it becomes a chest-crusher because the highs add the punch and growl.

These ranges are relative, but I'll throw in my two cents. Most audio people talk about 3 basic ranges: bass, midrange, and treble. These three ranges cover the human hearing range, from approx. 20 - 20k Hz. Bass (my guess here) is pretty much done by about 300 Hz. or so), and treble is probably frequencies above 4 kHz. So midrange would be about 300 - 4kHz.

We like to subdivide the above ranges even further. I'm gonna make a stab at it here, and would welcome some debate.